Powered roller blades - just like a large piston engined fighter, you have to counter the swing on take-off !
Mystery engine ID for Brian Cox.........

Hi Bob & Reggie,
I didn't think this engine would pose an ident. problem.
It's quite rare. It's the first version Bonnier 5 cc fixed compression, with a separate bolt-on head, instead of the blind cylinder used in the second version (my photo).
I think Reggie's French engines book says that this bolt-on head is the second version, but I (and Richard Dalby!) disagree. The book writers got their production dates wrong.
Anyway, the eBay engine is the first version Bonnier (with bits missing), and the second version is shown here.

Images

Hi Bob & Reggie,
I didn't think this engine would pose an ident. problem.
It's quite rare. It's the first version Bonnier 5 cc fixed compression, with a separate bolt-on head, instead of the blind cylinder used in the second version (my photo).
I think Reggie's French engines book says that this bolt-on head is the second version, but I (and Richard Dalby!) disagree. The book writers got their production dates wrong.
Anyway, the eBay engine is the first version Bonnier (with bits missing), and the second version is shown here.

Here is some modern art called " l'Homme a patins " (man with skates) Figure is wearing leather clothing and built up with mechanical remnants like the camera on the back, and in fact based on the professor Zonnebloem figure from Kuifje (TinTin) in The jewels of Bianca Castafiore. The rollers here are jet powered. Made by a well known French artist but of course I can not remember the name when I have to !!!!!!

It's FALSE Bob. I did originally mail the seller to tell him exactly what the engine was, but I think he received other mails and ended up inventing a "Dynamic Models" name! Oh dear! However, I think he did mention Gordon in his text, so all was not wasted.

It's FALSE Bob. I did originally mail the seller to tell him exactly what the engine was, but I think he received other mails and ended up inventing a "Dynamic Models" name! Oh dear! However, I think he did mention Gordon in his text, so all was not wasted.

But this definetely is a Gordon Burford engine right ?

Images

Hi Bob & Reggie,
I didn't think this engine would pose an ident. problem.
It's quite rare. It's the first version Bonnier 5 cc fixed compression, with a separate bolt-on head, instead of the blind cylinder used in the second version (my photo).
I think Reggie's French engines book says that this bolt-on head is the second version, but I (and Richard Dalby!) disagree. The book writers got their production dates wrong.
Anyway, the eBay engine is the first version Bonnier (with bits missing), and the second version is shown here.

Of course Bonnier, I should have known because if I remember well friend/collector L.Styfhals does have two both were mounted on a CL twin.
As for the French book, I did'nt bother to look this morning, on page 36 top picture shows the Bonnier 5cc 1ére version with bolted on head.

Reggie, we have a slight misunderstanding, I meant Gordon Cornell, who made the superb Dynamic 21 that Bob referred to...

Yes of course. It must be the Duvel causing confusion at times ... I remember Gordon did work for Frog and ED and designed quite a few of the engines. He did write good technical articles for MEW. Met him once at the J.Goodall stand at the Watford do.